Steiner 50mm Sunshade for M5Xi 3-15x50 Riflescope 5903 fits select 56mm objective lenses. Designed for Steiner M5Xi 3-15x50 Riflescopes. Provides tactical advantage to shooters by providing improved target visibility and blocks glare, making you less detectable to adversary. Sunshades also protect lens from dirt, debris, and scratches. Steiner M5Xi 50mm Military Scope Sunshade 5903